Isomerization behavior of azobenzene chromophores attached to the side chain of organic polymer in organic-inorganic polymer hybrids

被引：49

作者：

Imai, Y ^{[1
]}

Naka, K ^{[1
]}

Chujo, Y ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Engn, Dept Polymer Chem, Sakyo Ku, Kyoto 6068501, Japan

来源：

MACROMOLECULES | 1999年 / 32卷 / 04期

关键词：

D O I：

10.1021/ma981360y

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Isomerization behavior of azobenzene chromophores in organic-inorganic polymer hybrids was investigated. Polymer hybrids were prepared from azobenzene-modified poly(2-methyl-2-oxazoline) (POZO-A) and methyltrimethoxysilane (MeTMOS) or tetramethoxysilane (TMOS). Isomerization behavior in polymer hybrids was compared with that in DMSO solution or in films of POZO-A. Two kinds of model compounds were synthesized, and their isomerization behaviors were also examined. Photoinduced trans-to-cis isomerization took place in all samples. The cis isomer ratios in the photostationary state were found to be smaller in solid films than in solution. Especially, model compound having a triethoxysilyl group showed a markedly small cis isomer ratio. Thermal cis-to-trans isomerization was investigated kinetically. A distinct deviation from the first-order kinetics was observed in solid films.

引用

页码：1013 / 1017

页数：5

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